1. Department of Rehabilitation Medicine, Gangnam Severance Hospital, Seoul, Korea.
2. Rehabilitation Institute of Neuromuscular Disease, Yonsei University College of Medicine, Seoul, Korea.
3. Department of Rehabilitation Medicine, National Health Insurance Service Ilsan Hospital, Goyang, Korea.
4. Department of Rehabilitation Medicine and Research Institute of Rehabilitation Medicine, Yonsei University College of Medicine, Seoul, Korea.
5. Brain Korea 21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul, Korea.
6. Avison Biomedical Research Center, Yonsei University College of Medicine, Seoul, Korea.